One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,12)(10,14)(11,15)(13,16)(17,18,23,26)(19,20,21,24)(22,30,31,25)(27,32,29,28)(33,34,39,37)(35,40,45,46)(36,42,47,41)(38,44,48,43)(2,3)(7,9)(8,10)(15,16)(17,19)(18,24)(20,26)(21,23)(22,27)(25,32)(28,30)(29,31)(33,35,39,45)(34,40,37,46)(36,43,47,44)(38,41,48,42)(17,20,23,24)(18,19,26,21)(22,28,31,32)(25,27,30,29)(33,36,39,47)(34,41,37,42)(35,44,45,43)(38,46,48,40)(1,3,6,2)(4,7,12,9)(5,10,14,8)(11,15,13,16)(17,20)(18,19)(21,26)(22,28)(23,24)(25,27)(29,30)(31,32)(33,36)(34,42)(35,44)(37,41)(38,46)(39,47)(40,48)(43,45)(1,4)(2,7)(3,9)(5,13)(6,12)(8,16)(10,15)(11,14)(17,21,23,19)(18,24,26,20)(22,27,31,29)(25,28,30,32)(33,37,39,34)(35,40,45,46)(36,42,47,41)(38,43,48,44)(1,5,6,14)(2,8,3,10)(4,11,12,13)(7,15,9,16)(17,22,23,31)(18,25,26,30)(19,27,21,29)(20,28,24,32)(33,38)(34,43)(35,41)(36,46)(37,44)(39,48)(40,47)(42,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.